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Temperature-stable microwave dielectric ceramic LiNd2VO6 with ultralow dielectric constant
The invention discloses temperature-stable microwave dielectric ceramic LiNd2VO6 with a high quality factor and an ultralow dielectric constant and capable of being sintered at a low temperature and a preparation method of the microwave dielectric ceramic LiNd2VO6. The method comprises the following steps: (1) weighing and burdening original powder of Li2CO3, Nd2O3 and V2O5 with the purity which is not less than 99.9% (weight percent) according to the components of the LiNd2VO6; (2) carrying out wet ball milling and mixing on the raw material in the step (1) for 12 hours, wherein the ball milling medium is distilled water, drying and pre-burning at 850 DEG C in an air atmosphere for 6 hours; and (3) adding a binder to the powder prepared from the step (2), pelletizing, pressing, forming, and finally sintering at 900-950 DEG C in the air atmosphere for 4 hours, wherein a 5% polyvinyl alcohol solution is adopted as the binder; and the adding amount of polyvinyl alcohol accounts for 3% of total mass of the powder. The ceramic prepared by the method is good in sintering at a temperature not greater than 950 DEG C; the dielectric constant reaches 13.1-13.7; the quality factor Qf value can be up to 140,000-171,000GHz; the temperature coefficient of resonance frequency is small; and the ceramic has great application value in industry.
Temperature-stable microwave dielectric ceramic LiNd2VO6 with ultralow dielectric constant
The invention discloses temperature-stable microwave dielectric ceramic LiNd2VO6 with a high quality factor and an ultralow dielectric constant and capable of being sintered at a low temperature and a preparation method of the microwave dielectric ceramic LiNd2VO6. The method comprises the following steps: (1) weighing and burdening original powder of Li2CO3, Nd2O3 and V2O5 with the purity which is not less than 99.9% (weight percent) according to the components of the LiNd2VO6; (2) carrying out wet ball milling and mixing on the raw material in the step (1) for 12 hours, wherein the ball milling medium is distilled water, drying and pre-burning at 850 DEG C in an air atmosphere for 6 hours; and (3) adding a binder to the powder prepared from the step (2), pelletizing, pressing, forming, and finally sintering at 900-950 DEG C in the air atmosphere for 4 hours, wherein a 5% polyvinyl alcohol solution is adopted as the binder; and the adding amount of polyvinyl alcohol accounts for 3% of total mass of the powder. The ceramic prepared by the method is good in sintering at a temperature not greater than 950 DEG C; the dielectric constant reaches 13.1-13.7; the quality factor Qf value can be up to 140,000-171,000GHz; the temperature coefficient of resonance frequency is small; and the ceramic has great application value in industry.
Temperature-stable microwave dielectric ceramic LiNd2VO6 with ultralow dielectric constant
FANG LIANG (Autor:in) / CHEN JINWU (Autor:in) / SU HEPING (Autor:in)
01.07.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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